So, I just ordered a Realforce 87U (55g) and a Type Heaven. We'll see how it goes.
Did you order the black or white RF87U?
It will be interesting to see your impressions of the two Topre-switch keyboards. I have not tried the Type Heaven myself, but based on reports of others, I would say that the RF87U is the better board.
I am typing this on my RF87UB55. I have installed my Silencing Rings and lubed the stabilizers and switch rails. I've also swapped out the spacebar for a PBT one and put rubber shock absorbers under the space bar. Apart from the form factor (I prefer 60%), the modded RF87UB55 is now my favorite because of its quiet smoothness. To use a tired car analogy, the RF is like driving a luxury sedan. When I want to have the sports car experience, I use my HHKB.